How much is a 16 x 8 piece of shag carpeting?

I know it sounds dumb and has a lot of mantinence but i want to put shag carpet in my car ha. i have a 1999 ford expedition so ill need about a 16 x 8 piece of carpet. I know it depends but whats a ballpark estimate for how much it will cost. Any sites i can look at? Its 120 sq. feet.